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首页> 外文期刊>Journal of Biomechanics >A fluid-structure interaction study using patient-specific ruptured and unruptured aneurysm: The effect of aneurysm morphology, hypertension and elasticity
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A fluid-structure interaction study using patient-specific ruptured and unruptured aneurysm: The effect of aneurysm morphology, hypertension and elasticity

机译:使用特定于患者的破裂和未破裂的动脉瘤的流固耦合研究:动脉瘤形态,高血压和弹性的影响

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摘要

Fluid-structure interaction (FSI) simulations using five patient-specific aneurysm geometries are carried out to investigate the difference between ruptured and unruptured aneurysms. Two different blood pressure conditions (normal and hypertension, for all cases), and two different values of elastic modulus (1 and 2. MPa, for two cases) are tested. Ruptured aneurysms (RA) generally displayed larger displacement at the dome, lower area-average WSS and higher von Mises stress than unruptured aneurysms (URA) regardless of elasticity or blood pressure condition. RAs had a longitudinal expansion whereas URAs had a radial expansion, which was the key difference between the two types. The difference in expansion pattern may be one of the keys to explaining aneurysm rupture, and further analysis is required in the future to confirm this theory.
机译:使用五个特定于患者的动脉瘤几何结构进行了流体-结构相互作用(FSI)模拟,以研究破裂和未破裂的动脉瘤之间的差异。测试了两种不同的血压状况(对于所有情况均为正常和高血压),以及两种不同的弹性模量值(对于两种情况为1和2 MPa)。与未破裂的动脉瘤(URA)相比,破裂的动脉瘤(RA)通常在穹顶处显示更大的位移,较低的平均面积WSS和较高的von Mises应力,而不管弹性或血压状况如何。 RA具有纵向扩展能力,而URA具有径向扩展能力,这是两种类型之间的主要区别。扩张方式的差异可能是解释动脉瘤破裂的关键之一,将来需要进一步分析以证实这一理论。

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